DCAN demo in StarterWare on an EVM AM335x

Mikael Jansson

I’m trying to test the DCAN demo on StarterWare 02_00_00_06 on a TI EVM AM335x board but I can’t get it to work. I have flashed a SD-card with the prebuilt MLO and and APP binary and this works fine when I boot in profile 0 (SW8 0000), StarterWare starts and I can click around on the touch screen watching demos and so on. I restart the EVM in profile 1 (SW8 1000), which according to the User Guide documentation shall be set in this mode to be able to run the DCAN demo applications. When set the switch(SW8) to profile 1 the EVM doesn’t boot correctly, it get’s stuck on the splash screen. I have serial terminal window connected to the EVM, but no information is outputted, nor can I input any information. I don’t have a CAN connection to a second EVM during this.

What am I doing wrong here?

Do I need a second EVM connected over CAN for the first EVM to boot correctly? (I understand that I need this to be able to do the full demo, but first of I’m just interested in getting executing one of the applications DCANTxRx and DCANLpBk on one EVM because I have PC with a CAN dongle)

What exactly is the difference between profile 0 and profile 1 on the EVM AM335x?

over 13 years ago

0 Jeethan Castelino over 13 years ago

TI__Intellectual 1400 points

Hi Mikael

Profile setting is applicable for the General purpose daughter board on the EVM. This is done because there are many components on the daughter board(For e.g. DB9 connector's etc. And peripherals like DCAN, UART can be accessed on the same component/connector, but in different profiles).

For e.g. DCAN can be accessed via DB9 connector(J11 on the EVM) and some other peripheral can be accessed on the same connector in different profile setting.

From your query, i can understand that you booted the prebuilt binaries(MLO and app) given with StarterWare 02_00_00_06 package in profile 0 and 1. This application does not support DCAN(i.e. DCAN is not demonstrated via this application).

To demonstrate DCAN, there are two applications (dcanTxRx and dcanLpBk). You need to use the binaries given under the folder "dcanTxRx" and "dcanLpBk" and place EVM in profile setting 1.

With this setting the application should work.

More information for DCAN on StarterWare is given here: http://processors.wiki.ti.com/index.php/StarterWare_02.00.00.06_User_Guide#DCAN

Regards,

Jeethan

0 Fredrik Svensson over 13 years ago in reply to Jeethan Castelino

Prodigy 20 points

Hi Jeethan,

Thank you for some clearification but I still have a question. I understand that I shall execute the applications DCANTxRx and DCANLpBk (I have read your DCAN instructions), but how? I have tried flashing the SD-card with the prebuilt MLO bootloader and the one of the binaries of DCANTxRx/DCANLpBk but that dosen’t work either, I have tried a lot of other things also, some help here describing exactly how to execute these application would be much appreciated.

0 Jeethan Castelino over 13 years ago in reply to Fredrik Svensson

TI__Intellectual 1400 points

Mikael,

I guess you have used the wrong binary to boot via MMC/SD card. Please use the binary named as "dcanTxRx_ti.bin". Rename this binary to 'app'.

Copy this 'app' to the MMC/SD card along with 'MLO'. Place the board in profile 1 and execute the application.

FYI on Flashing and booting via SD card: http://processors.wiki.ti.com/index.php/AM335X_StarterWare_Booting_And_Flashing#Booting_Via_SD_Card

Regards,

Jeethan

0 Fredrik Svensson over 13 years ago in reply to Jeethan Castelino

Prodigy 20 points

Hi,

Thank you for clarifying that, it works now!

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DCAN demo in StarterWare on an EVM AM335x